How to tell when your Seiko watch was made (Part 1)
6309-589A] Looking for more info on my dad's Seiko. Serial# from 1983, bought in 1985. Can't find it in the Japanese catalogues from 83-85, or anywhere online. Smart looking watch, any ideas
Seiko Skx Serial Number Lookup Discount - anuariocidob.org 1690578658
Deciphering Seiko Case Back Information — Plus9Time